Mention the fix in the changelog.

andrykonchin · eregon · commit f84bb0d2d56e · 2023-04-19T12:37:17.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -12,6 +12,7 @@ Compatibility:
 * Make `Array#shuffle` produce the same results as CRuby (@rwstauner).
 * Add `Process.argv0` method (@andrykonchin).
 * Add support for array pattern matching. This is opt-in via `--pattern-matching` since pattern matching is not fully supported yet. (#2683, @razetime).
+* Fix `Array#[]` with `ArithmeticSequence` argument when step is negative (@itarato).
 
 Performance:
 
